mean of 20 obserevation is 17. if in the observation ,observation 40 is replaced by 12 find the new mean
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mean of 20 observations = 17
Sum of the 20 observations = 17 x 20 = 340
New sum of 20 observations = 340 – 40 + 12 = 312
New mean=312 ÷ 20 = 15.6
Answered by
1
Answer
15.6
Step-by-step explanation:
mean of 20 observations =17
Sum of the 20 observations = 17×20=340
new sum of 20 observations= 340-40+12 =312
New mean = 312÷20 = 15.6
.... hope it's help you....
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